* {
    margin: 0px;
    padding: 0px;
}

body {
    width: 99%;
    margin: 0 auto;
}
.center-block {
   display: table;
   margin-left: auto;
   margin-right: auto;
}
.left {
    float: left;
}

.main {
    overflow: hidden;
}
.data_tab {
    margin: 20px auto;
    overflow: hidden;
}
.data_unit {
    margin-left: 3%;
}

.col-sm-6 {
    margin-bottom: 10px;
}

.div_canvas {
    position: relative;
}
.canvas {
    cursor:crosshair;
    position: absolute;
    top: 19px;
    left: 19px;
}
.div_canvas div{
    height: 100%;
}
